Radioactive Fallout, by an unknown designer, 1955. 

The Federal Civil Defense Administration played to fear, elevating Cold War worst-case scenarios as a means of galvanizing the public into action. These posters were distributed across the country, with the blank area at the bottom being used for the names of local businesses that were supporting regional civil defense initiatives. 

Upcoming in Swann’s April 24, 2014 auction of Modernist Posters.

(via lonelyheart-cluband)